code: def test_edit_children(self):
      plt.close("all")
      g = Graph.Ring(5)
      fig, ax = plt.subplots()
      plot(
          g, target=ax, vertex_shape="o", layout=self.layout_small_ring
      )
      graph_artist = ax.get_children()[0]
  
      dots = graph_artist.get_vertices()
      dots.set_facecolors(["blue"] + list(dots.get_facecolors()[1:]))
      dots.set_sizes([20] + list(dots.get_sizes()[1:]))
  
      lines = graph_artist.get_edges()
      lines.set_edgecolor("green")
  
imports: import os
  import unittest
  from igraph import Graph, plot, VertexClustering, Layout
  from ...utils import overridden_configuration
label_desc: Use image node_id 10 for calling the GraphTestRunner obj's underlying member method code with example usage: obj.test_edit_children() without return types